The garage is unheated and damp, and I've noticed mildew on things.

I have left the doors and windows open for a couple of days and that
seems to have helped, but I'd like to do a bit better.

There's a chest freezer in there, that collects a lot of condensation on
the sides and lid.

I don't want to buy or run a dehumidifier unless absolutely necessary,
but perhaps the warmer (therefore damper) air around the freezer could
be ducted outside with the help of an extractor fan - it seems a shame
to waste the heating and damp-collecting properties of the freezer.

Thanks,

Daniele